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The purpose of this study is to evaluate antioxidant balance in pregnant women with meconium-stained amniotic fluid. Forty pregnant women with meconium-stained amniotic fluid and 40 pregnant women with non-meconium-stained amniotic fluid were included in the study. By checking the ischemia modified albumin (IMA) level and thiol/disulfide homeostasis in the maternal blood during labor and in newborn umbilical cord blood at the first minute after birth, antioxidant/oxidant balance was evaluated. No statistically significant difference was found between the maternal albumin levels. Maternal IMA level was statistically significantly higher in the meconium group than in the control group ( p  = .045). Maternal native thiol (SH) and maternal total thiol levels were statistically significantly higher in the control group than in the meconium group ( p  = .042 and  p  = .009, respectively). No statistically significant difference was found between maternal disulfide/native thiol ( p  = .262), maternal disulfide/total thiol ( p  = .152), maternal native thiol/total thiol ( p  = .153) rates in both groups. No statistically significant difference was determined between the patients with meconium and the control group in terms of cord blood IMA ( p  = .474), Albumin levels ( p  = .664), cord blood Native thiol ( p  = .944), cord blood total thiol ( p  = .612) levels and cord blood disulfide/native thiol ( p  = .240), cord blood disulfide/total thiol ( p  = .276), cord blood native thiol/total thiol ( p  = .277) rates. Determination of a decrease in SH and Total Thiol levels in maternal serum and an increase in the meconium group’s IMA level was interpreted as a shift of antioxidant balance toward oxidant in this group.

Assessment of thiol/disulfide and ischemia modified albumin level and oxidative stress in pregnancies complicated by meconium